@article{trichy_chakraborti_narayan_prater_2008, title={Structure-magnetic property correlations in the epitaxial FePt system}, volume={92}, number={10}, journal={Applied Physics Letters}, author={Trichy, G. R. and Chakraborti, D. and Narayan, J. and Prater, J. T.}, year={2008} } @article{chakraborti_trichy_narayan_prater_kumar_2007, title={Effect of Al doping on the magnetic and electrical properties of Zn(Cu)O based diluted magnetic semiconductors}, volume={102}, number={11}, journal={Journal of Applied Physics}, author={Chakraborti, D. and Trichy, G. and Narayan, J. and Prater, J. T. and Kumar, D.}, year={2007} } @article{trichy_chakraborti_narayan_zhou_2007, title={Growth, characterization, and magnetic properties of FePt nanodots on Si (100)}, volume={102}, number={3}, journal={Journal of Applied Physics}, author={Trichy, G. R. and Chakraborti, D. and Narayan, J. and Zhou, H.}, year={2007} } @article{chakraborti_ramachandran_trichy_narayan_prater_2007, title={Magnetic, electrical, and microstructural characterization of ZnO thin films codoped with Co and Cu}, volume={101}, number={5}, journal={Journal of Applied Physics}, author={Chakraborti, D. and Ramachandran, S. and Trichy, G. and Narayan, J. and Prater, J. T.}, year={2007} } @article{chakraborti_trichy_prater_narayan_2007, title={The effect of oxygen annealing on ZnO : Cu and ZnO :(Cu,Al) diluted magnetic semiconductors}, volume={40}, ISSN={["1361-6463"]}, DOI={10.1088/0022-3727/40/24/002}, abstractNote={Here we report a systematic study of magnetic, electronic and microstructural properties of Cu-doped and Cu and Al codoped ZnO thin films, grown epitaxially on a (0 0 0 1) sapphire substrate by the pulsed laser deposition technique. The films were annealed in oxygen at high temperature (600 °C) and their properties were compared with the as deposited films in order to study the role of defects like oxygen vacancies on the ferromagnetic properties. The doping of ZnO : Cu specimens with Al increased the carrier concentration by three orders of magnitude (from 1017 to 1020 cm−3) without altering the ferromagnetic ordering. On the other hand, a reduction in oxygen vacancies concentration brought about by high temperature annealing in oxygen had a large detrimental effect on ferromagnetism. These results tend to eliminate a free carrier mediated mechanism and point towards a defect mediated mechanism, such as a bound-magnetic-polaron mediated exchange, as being responsible for stabilizing long-range ferromagnetic ordering in these systems.}, number={24}, journal={JOURNAL OF PHYSICS D-APPLIED PHYSICS}, author={Chakraborti, D. and Trichy, G. R. and Prater, J. T. and Narayan, J.}, year={2007}, month={Dec}, pages={7606–7613} }